XR16V2551 Datasheet, PDF (40/51 Pages) Exar Corporation – HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

XR16V2551
PRELIMINARY
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
AC ELECTRICAL CHARACTERISTICS
REV. P1.0.0
UNLESS OTHERWISE NOTED: TA = -40^O TO +85^OC, VCC=2.25 - 3.63V, 70 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
T_SI
T_INT
T_WRI
T_SSR
T_RR
T_WT
T_SRT
T_RST
Bclk
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Delay From Stop To Set RXRDY#
Delay From IOR# To Reset RXRDY#
Delay From IOW# To Set TXRDY#
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Clock
LIMITS
2.5V ± 10%
MIN
MAX
45
LIMITS
3.3V ± 10%
MIN
MAX
45
8
24
8
24
45
45
1
1
45
45
45
45
8
8
40
40
16X or 8X or 4X of data rate
UNIT
ns
Bclk
ns
Bclk
ns
ns
Bclk
ns
Hz
FIGURE 13. CLOCK TIMING
T_ECLK
VIH
External
Clock
VIL
T_ECH
T_ECL
40